Maschinen-werke aktiengeselxschaft



'June 7, 1932. c. scHLUNs 1,852,240.

CALCULTING TYPEWRITING MACHINE Filed April 1e. 192s 5 sheets-sheet 1 June 7, 1932. c. scHLUNs 1,862,240

CALCULATING TYPEWRITING MACHINE l@ S IS S o o d o o o 0| ai June 7, 1932. Q SCHLUNS CALCULATING TYPEWRITING MACHINE Filed April 16, 1923 5 Sheets-Sheet 3 e Q wl G.

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' CLCULATING TYPEWRITING MACHINE Filed April 1e, 192s 5 sheets-sheet 43' @Kwak June 7', 1,932. c. scHLUNs 1,852,240

CALCULATIINIGv TYPEWRITING MACHINE Filed `April 16, 192s 5 sheets-sheet S i' simultaneous depression of a figure or type- Patented June` 7, 1932 UNITED. STATES PATENT OFFICE CARL SGHLNS, 0F BERLIN-STEGLITZ, GERMANY, ASSIGNOR '10 MERCEDES BRO- MASYCHINEN-WERKE AKTIENGESELLSCHAFT, OF ZELLA-MEHLIS, THURING-IA,

MANY

CALCU LATIN G TYEEWRITING MACHINE Application filed April 16, 1923, Serial No. 632,480, and in Germany April` 20,- 1922. l

This invention relates to a calculating typewriting machine. According to the invention the energy consuming work of the calculating and of the typewritin-g are car- 5 ried out by mechanically driven continuously rotating elements. At the depression of a typewriting or calculating key the transmission members are coupled with the continuously revolving driving elements so that a light touch of' the key with the shortest possible stroke 'and a secure working of the machine are secured. It is advisable to arrange the drive of the iigure typebars so that .it may be coupled to the latter by striking either the iigure keys or the calculating type bars. The operation of the figure keys is effected only after the complete transmission into the calculating mechanism of the value registered by the calculating keys, in order to prevent a premature advance of the carriage and consequently a premature feeding of the calculating mechanism. The special driving member for the calculating mechanism arranged in a lower frame acts by a thrust moarranged in the upper frame part on the typewri'ting machine. Owing to this arrangement, `on removing the typewriting machine per se from the casing of the calculating keys it is not necessary to disconnect special connecting rods and the type bar basket with the transmission means for the calculating mechanism can also be easily removed as a whole from the typewriting machine.

The locking, known per se, designed to prevent theoperation of the calculating mechanism at the comma position is preferably also produced by' interrupting the mechanical drive. In 'order to securely prevent the key and of a Vcalculating key a member is used for the simultaneous locking of all the transmission elements of the calculating keys 0 directly upon a wedging roller known per se tion'upon the calculating mechanism which is at the operation of a type o r ligure key sol that the mechanical drive is interrupted..

yand is controlled by the calculating key on the first part of the stroke of this key. y

A preferred form of mechanism by which the invention is carried into effect is shown by way of example on the accompanying drawings, wherein Fig. 1 shows the mechanism in cross section.

Fig. 2 is a plan view of the case for the calculating keys 'with thev keys 1 to 9, the

Figure 8 is a section of'FigureG` on line 8 8; and I Figure 9 is a section of Figure 7 on line 9 9.

The machine is shown in Fig. 1 in they position of rest. The two driving elements land 2 revolve constantly but they are adapted to be alternately stopped with the aid of convenient` clutch members according to whether the machine is to be used for typing or for calculating.

On the constantly rotating shaft 2 (Figs. 4 and 6 9) is fixed a collar 11 by means of screw a, which engages a recess in the shaft.

The clutch ring 12 is revolubly mounted on the collar 11 and is provided with a recess c eccentric to its axis. The clutch roller 10 lies normally free in this recess. The clutch ring is provided with a tangential recess 12a, which intersects the recess-0. A collar d adjacent collar 11 is provided with a central aperture of such diameter that it does .not

contact with the'shaft. A lever e supported from the frame 48 by means of screws f su ports collar d and prevents its rotation. n

lthe hub g of collar d is rotatably arranged with the nose v6 of the-pawl 8 rotatably ar-l 10 ranged on axle 7 so that pawl 8 is lifted. The

nose 9 of pawl 8- thus releases the clutch roller 10 which now, carried along by its friction with the collar 11 rotating in the direction of the arrow, is wedged between the collar 11 and the' top wall ofrecess c. In this manner disc 14, which is positively attached to the collar 12 is coupled with collar 11 and is forced in the rotation of the latter.

At the depression of a key 3 only one revolution of the corresponding disc 14 will take place, even if the key isy held in depressed position, since nose of the pawl 4 after a very short stroke glides over nose 6 of the pawl 8 so that nose-9 of the latter returns into the yslit 12av of the clutch ring before the rotation of the latter is completed and is thus in aposition to intercept roller whereby the coupling between disc 14 and the constantly rotating drive element 11 is interrupted. c

A slide 16 having a roller 17,on its lower end which is pressed by the action of a spring 18a against the cam 14 so that it works posi-- tively, descends at the rotation of cam 14 inaccordance with the shape of this cam whereby, ifa value has to be transferred to the counting mechanism 15, at the descent of the slide 116 at first the universal bar 19 is moved to the left by the camedge 18 of the slide16, said universal barv 19 being constructed like a pawl in cross section, pivotally connected with levers 20 (of whichv only one is shown) and stopped by pin`21 when rotating in ldownward direction. The lever 20 is keyed upon a rotatable axle 22 so that the axle' is oscillated. ,On axle 22 a lever 23 is keyed also, which is thus oscillated to the right so that it comes in contact with the locking lever 24 of the countin-g gmechanism 15 which it unlocks upon 'further oscillation sothat the counting mechanism is-released and prepared for the registering of anew value.

During the first working period the 'slide 16 has descended so far that the inclined slot 26 of the slide 1 6 has arrived near the rod 25. When the descending movement continues the inclined slot 26 of the slide 16 all together, around a colnmon axle 28. The

55 toothed'segment 27 is in gear with the toothed slides along said rod 25 and as'the rod 25y is rigidly connected with the toothed segment wheel 28 keyed on shaft 44 so that this shaft isrOtated. A second toothed wheel of the same diameter as toothed Wheel 28 is loosely mounted on shaft 44 and adapted to be coupled with said shaft by means of a convenient ratchet device if the shaft rotates in one direction, but to be uncoupled if the shaft rotates in the opposite direction. This loose toothed wheel meshes with a toothed 4wheel-29 keyed on axle30. On this axle 30 a toothed wheel 31 is further arranged which transmits the movement imparted by the toothed'segment 27 to the driving wheel 32 of the counting mechanism 15 so that a value is transferred to this counting mechanism. At this instant rod 25 has arrived at the end of the inclined slot 26 and enters into the vertical slot 33 whereby the toothed segment 27 is stopped, the transfer of a value to the calculating mechanism 15 being thus completed.

The slide 16 has descended so far that the universal bar 19 slides off the upper edge 45 of said slide.l The levers 20-and 23 return to their position of rest vand the locking lever 24 locks up the value transferred into the calculating mechanism.

At the further descent vof thc slide 16 its pin 34 comes in contact with a surface 35 of a ligure key 36 and depresses this key so that, though. the intermediary of apawl 37 the nose 38 of which grips over a projection 39 of the traction element 40, this element i s pulled and its nose 41 is brought into the range of the constantly rotating driving element 1. The traction element 40 which is hingedly connected with the intermediate lcvcr 42 is thus pulled forward and throws the type lever 43, with which it is connected in a commonly used manner, against the platen 14". The value which had been transferred into the calculating mechanism 15 isv thus printed upon the paper on the platen 14".

The feeding of the platen takes place only during the return of the type'lever 43 to its normal position of rest. The successive working periods are as follows First lworking period.-Unlocking of the l calculating mechanism for the reception of a value. l

Second working perz'orL-Transfer of a value into the calculating mechanism.

Thirdl working period-Locking of the value which has been transferred into the calculating mechanism.

Fourth workng'period.-Typing of the Value transferred into the calculating mechanism. A

Fz'fthworking pem'od.'-Feeding of the platen.

After the above-stated Working periods have been completed the cam disk 14 has revolved so far that the roller 17 of slide 16 bears upon the face 14*Il of the cam 14 having thus reached its lowest position. When'the cam disk 14 continues to revolve the slide 16 is gradually pushed upward into the initial position, the nose 9ct the pawl 8 engaging within the slit 12a of the clutch ring 12 so that, as the roller 10 strikes against the nose 9 of the pawl, the cam disk 14 isdisengaged from the constantly rotating driving element 2.

In calculating mechanisms with comma inserting means a lock -has to be provided in order that, if' a calculating key should be accidentally depressed, at the comma position, the corresponding ligure key 36 will not be operated. With this object in view a fixed stop is arranged in the calculating mechanism at the comma position as substitute for the releasable locking lever 24. If in this Aposition of the mechanism a calculating key 3 is depressed the slide 16 can descend only until its cam edge 18 comes in contact with the universal bar 19 and makes the latter oscillate until the lever 23 comes in contact with the stop 24. The slide 16 is thus locked in this position, that is so'soon that neither the shaft 25 can reach the inclined `slot 26 nor the pin 34 can reach the surface 35 of the ligure key 36. The cam 14 continues its revolution, however, and at the last part of the revolution raises-the slide 16 into the initial position.

A well known roller stop gear'46a serves to `prevent two calculating keys 3 from being depressed at the same time, said stop gear locking all the other keys if one key is being depressed. A similar stop gear 47 is provided also for the figure and type keys so that only one of, these keys can `be depressed.

Another vlocking device is provided, that' during the depression of a figure or type key 36 or 46 by hand prevents the descending of lany of the slides 16 in spite of the depression of a calculating key 3, thereby preventing the transferring of a value to the calculating mechanism. This locking device consists in the main in a universal bar 50, which extends I under all the figure andtype key levers and is lowered at the depression of such key. The pawl rail 51 is thus oscillated so that it comes under the nosesv 52-of all the slides 16. If a calculating key 3 is now depressed the slide 16 cannotdescend as its nose 52 is lopkedby the pawl bar 51 and` the transfer of a value.

to the calculating mechanism 15 is prevented. The transfer of a value by a calculating key 3 ,can take place only if all the figure and type keys are in the position of rest.

The thrust drive of the slide 16 facilitates the assembly of the machine.'

Owing lto tliis arrangement the cage 55. with the transmission mechanism for the calculating mechanism 15 may be removed, the dove-tail slides 56 sliding upon the guides 57 (Fig. 5),- afterl the pin 58 has been loosened. .Thetypewri'ting machine may be further dis- -connected from the case 48 o f l the calculating calculating mechanism, a constantly rotating shaft, control members for said calculating mechanism, means for clutching said control members individually to said shaft, and key actuated means for selectively throwing in said clutches and automatically releasing the same upon one complete rotation of the control member, said keys on their down strokes moving clear of themeans for throwing in and releasing said clutches.

2. In a calculating typewriting machine, a pair of continuously rotating shafts, a calculating mechanism, transmission members for operating said calculating mechanism, a control member for each transmission member, means for selectively coupling said control members to one of said shafts,'figure type bars, a key lever for each type bar, means on said transmission members for operating said key levers, means for individually coupling the type bars to the other shaft foroperation thereby, and links connected to said key levers for actuating said last mentioned coupling means.

3. A calculating typewriting machine comprising a constantly rotating driveshaft, selectively operable control members on 4said shaft, a calculating mechanism, transmission members for the calculating mechanism adapted to be controlled by said, control members, springs arrangedy toV impart the driving force to said transmission members, and figure keys adaptedto be `operated from respective transmission members.

4. A calculating typewriting machine comprising a constantly rotating drive shaft, selectively operable control members on said shaft, a calculating mechanism, transmissionI members for* the calculating mechanism adapted ,to be controlled by said control mem-v bers, figure keys, connections between said ltransmission membersandlsaid figure keys adapted to actuate the latter subsequent to the complete transmission of respective values to the calculating mechanism by said transmission members.

5. In a calculating typewriter, a paircof rotating shafts, type bars, key levers for said members for operating said calculating.

mechanism, control members for said transinissionmembers on the other shaft, a second set of key levers for selectively rendering said control members operative, and means on said transmission members for actuating the corresponding key lever of the first mentioned set of key levers, said second set of key levers having no direct connection with said transmission members.

6. In a calculating typewriting machine, a pair of constantly rotating shafts, figure type bars, type keylevers, an actuating mem-- ber for each key lever, a control member for each actuating member, means for selectively coupling said control members to one of said shafts, and means controlled by said key lev'- ers for coupling said type bars to the other shaft for operation thereby. f

7. In a calculating typewritiii'g machine, a pair of constantly rotating shafts, figure type bars, type key levers,fa.n actuating member foreach key lever, a control member for each actuating member, means for selectively coupling said lcontrol members to one of said shafts, means controlled by said key levers mission mechanism and between said trans-V mission .mechanism ancl said calculating mechanism being merely abutting connections, whereby the upper frame, the, lower frame, and the-unitary typewriting machine and transmission mechanism can be separated from each other to facilitate cleaning, withou the necessity 4of unfastening connecting ro s.

9. In a calculating typewriting machine, type keys, a calculating mechanism, motoractuated control means for said calculating mechanism, transmission means interposed between said control means and said calculating mechanism, 'and means for locking said transmission means against the influence of said control means on the depression of a type key. i Y' y 10. In a calculating typewriting machine, a calculating mechanism, a constantly rotating shaft, control members for said calculating mechanism, clutches for coupling said control members individually to said shaft, pawls normally engaging said clutches for holding the-same disenga-ged, and key levers having dogs for moving said pawls from clutch engaging position, said dogs movingposition regardless of whether the past said pawls after moving the same to-permit the pawls to return to clutch en aging ey is released or not.

11. In a calculating typewriting machine, a calculating mechanism, a constantly rotating shaft, a plurality of cams rotatably mounted on said shaft, means for selectively coupling said cams to said shaft, and spring influenced transmission members interposed between said calculating mechanism and said cams and normally urged toward the latter.

12; In a calculating typewriting machine, a calculating mechanism, selectively operable motor driven cams, spring influenced transmission members interposed between said calculating mechanism and said cams and normally urged toward the latter, type bars, key levers therefor, and means controlled by said key levers for restraining said transmission members from the influence of said cams.

13. In a calculating typewriting machine, a calculating mechanism, a set of calculating keys, a constantly rotating shaft, cams revoliibly mounted on said shaft for controlling said calculating mechanism, a clutch for each cam for coupling the same to said driving shaft, a pawl normally engaging each clutch for holding the same disengaged, and means inserted between each pawl and its corresponding calculating key forI moving lthe pawl from clutch engaging position, said means forming an operative connection only during theifirst portion of a downward stroke of the key. l.

14. In a calculating typewriter, a calculating mechanism, a set of selectively operable cams, transmission members interposed between said calculating mechanism and said cams, and springs urging said transmission members toward said cams and in the directionfor actuation of said' calculating mechanism, said cams being adapted to restore said transmission members after each actuation.

15. In a calculating typewriting machine, a calculating mechanism, a power drive therefor, a set'of calculating keys for controlling said power drive, a set of figure type bars, type keys therefor, and connections between members of said power drive and said type keys, adapted to become effective only after the transmission of a value to said calculating mechanism, for actuating said type keys.4

16. In a calculating typewriting machine, a calculating mechanism, driving means therefor, a set of ligure type keys, a set of combined key actuating and transmissionv members having inclined cam surfaces adapted to actuate said driving means andy means for engaging said keys to actuate the same, said engaging means being-adapted to strike said keys after said inclined cam surfaces have passed said driving means, and means for selectively driving said transmission members.

17. In a calculating typewriting machine, a calculating mechanism, transmission members adapted to operate said calculating mechanism, a constantly rotating shaft, selectively operable cams on said shaft, springs urging said transmission members against said cams, and figure keys adapted to be operated by said transmission members under the powerof said springs. 18. In a calculating typewriting machine; a set of figure type keys; a set of calculating keys; two frames in which said sets of keys are respectively mounted; a power drive, comprising a set of eccentrics, mounted in the frame having the calculating keys, and actuating members for said figure type keys abutting on, but otherwise not connected with said eceentrics; said two frames being freely separable. c l

19. In a calculating typewriting machine, `a c alculating mechanism, selectively operable motor ldriven cams, and spring influenced transmission members interposed between said. cams and said calculatlng mechanism and normally urged toward the former.

20. In a calculating typewriting machine, a calculating mechanism, a typewriting mechanism, a pair of constantly rotating power driven members, driving means between said calculating mechanism and one of said power driven members comprising a set of cams adapted to be selectively coupled to. said power driven member and transmission members normally in operative condition between said cams and said calculating mechanism, driving connections between the other of said power driven members and said typewriting mechanism, keys controlling said driving connections, and means on said transmission members for actuating some of said keys.

21. In a calculating typewriting machine, a calculating mechanism, a constantly rotating shaft, control members for said calculating mechanism rotatably mounted on said shaft,

each control member comprising means for clutching the same to said shaft, stop and release members for said clutching means, and a set of keys having means for eiecting a transitory connection between each key and 5o a corresponding stop and release member during downward motion of the key, the connection being broken before the key reaches the bottom of its movement.

22. In a calculating typewriting machine;

two separable frames, one mounted upon the other; typewriting and calculating mechanism in the upper frame; driving means comprising a series of cams in the lower frame; transmission members in the upper `frame for driving said calculating mechanism, said transmission members abutting against said cams, and springs urging said transmission members toward said cams.

23. In a calculating typewriting machine;

two separable frames, onemounted upon the other; typewriting and calculating mechanism in the upper frame; driving means comprising a series of cams in the lower frame; transmission members in the upper frame for driving said calculating mechanism, said transmission members abutting against said cams, springs urging said transmission members toward said cams, and locking devices on the upper frame whereby said transmission, members may be held in elevated position when the frames are separated.

24. In a calculating typewriting machine;

p, two separable frames, one mounted upon the other; typewriting and calculating mechani sm in the upper frame; driving means comprising a series of cams in the lower frame; transmission members in the upper frame for driving said calculating mechanism, said transmission members abutting against said cams, springs urging said transmission members toward said cams, and means controlled by said calculating mechanism for locking said transmission members in elevated position.

25. In a machine of the class described, two freely separable frames, a calculating mechanism and driving members therefor mounted in one of said frames, a typewriting mechanism including ligure type keys mounted in the sameframe, calculating keys and a power drive comprising a set of eccentrics mounted in the other of said frames,- said driving members abutting on but otherwise not connected with said eccentrics, and actuating members on said driving members for operating said figure type keys.

, 26. In a calculating typewriting machine, a pair of constantly rotatingmembers; numeral type bars; driving means for each of said type bars adapted to be coupled with one of said constantly rotating members; a coupling mechanism for each driving means, including power transmitting devices operated by the other of said constantly rotating members; and manipulative means for causing the selective operation of said coupling mechanisms.

27. In a calculating typewriting machine, a calculating mechanism, a typewriting mechanism, a power drive for said typewriting mechanism, a power drive for said calculating mechanism, transmission members between said second mentioned power drive and said calculating mechanism, and a coupling mechanism operated by said transmission members for coupling said typewritingmechanism with said first mentioned power drive.

The foregoing specification signed at Berlin this 24 day of March, 1923.

CARL SCHLNS. 

